77239425 has 12 divisors (see below), whose sum is σ = 127702640. Its totient is φ = 41194320.

The previous prime is 77239423. The next prime is 77239457. The reversal of 77239425 is 52493277.

It is not a de Polignac number, because 77239425 - 2¹ = 77239423 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77239423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514855 + ... + 515004.

Almost surely, 2^77239425 is an apocalyptic number.

77239425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77239425 is a deficient number, since it is larger than the sum of its proper divisors (50463215).

77239425 is a wasteful number, since it uses less digits than its factorization.

77239425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029872 (or 1029867 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The square root of 77239425 is about 8788.5963043025. The cubic root of 77239425 is about 425.8725786554.

The spelling of 77239425 in words is "seventy-seven million, two hundred thirty-nine thousand, four hundred twenty-five".